The problem is​ that splash pages lack content that can indexed,​ contain zero links,​ usually and often display a​ "redirect" to​ the​ real home page. Search engines algorithms think you​ are trying to​ trick them if​ they see a​ redirect on​ what is​ supposed to​ be a​ home page. the​ bottom line is​ that you​ must avoid redirects if​ you​ are serious about being found by search engines. an​ introductory splash page is​ not recommended for businesses that are not known as​ not only can they sabotage your SEO efforts but often they are quite expensive to​ be designed too.